Trouble installing GS from source

I'm trying to install Ghostscript 9.23 from source, and getting some errors I'm not familiar with. I'm using CentOS. $ cat /proc/version Linux version 2.6.9-67.ELsmp (brewbuilder@ls20-bc1-14.build.redhat.com) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-8)) #1 SMP Wed Nov 7 13:58:04 EST 2007 After ./configure I run make and get the following errors... ./lcms2art/include/lcms2art.h:146:10: warning: "ULLONG_MAX" is not defined ./lcms2art/include/lcms2art.h:153:10: warning: "LLONG_MAX" is not defined ./lcms2art/src/cmsplugin.c: In function `_cmsReadFloat32Number': ./lcms2art/src/cmsplugin.c:195: warning: implicit declaration of function `fpclassify' ./lcms2art/src/cmsplugin.c:195: error: `FP_ZERO' undeclared (first use in this function) ./lcms2art/src/cmsplugin.c:195: error: (Each undeclared identifier is reported only once ./lcms2art/src/cmsplugin.c:195: error: for each function it appears in.) ./lcms2art/src/cmsplugin.c:195: error: `FP_NORMAL' undeclared (first use in this function) make: *** [obj/cmsplugin.o] Error 1 What does that mean? How do I fix it?